EP0852289A1 - Procédé de gestion d'un moteur à combustion interne et moteur correspondant - Google Patents
Procédé de gestion d'un moteur à combustion interne et moteur correspondant Download PDFInfo
- Publication number
- EP0852289A1 EP0852289A1 EP97403138A EP97403138A EP0852289A1 EP 0852289 A1 EP0852289 A1 EP 0852289A1 EP 97403138 A EP97403138 A EP 97403138A EP 97403138 A EP97403138 A EP 97403138A EP 0852289 A1 EP0852289 A1 EP 0852289A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- cylinders
- engine
- fuel
- supplied
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
- F02D41/1443—Plural sensors with one sensor per cylinder or group of cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/02—Cutting-out
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/02—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by cutting out a part of engine cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a method for managing a internal combustion multi-cylinder engine and one such engine.
- a petrol engine is powered in fuel at stoichiometry, that is to say that we inject a quantity of fuel corresponding precisely to the quantity of oxygen introduced during the admission of air into the cylinder. All fuel is oxidized and the amount of nitrogen oxides produced during combustion remains low.
- the catalyst that we has at the engine outlet to receive exhaust gases works satisfactorily at stoichiometry to clean up exhaust gases from nitrogen oxides, carbon monoxide and unburnt carbohydrates.
- the object of the present invention is to remedy the disadvantages of the processes mentioned above by proposing a process management of an engine with low fuel consumption while remaining little polluting.
- the present invention also aims to provide a management process and an engine that combines low pollution of motors with stoichiometric mixture and low consumption of lean mixture engines.
- the process for managing a multi-cylinder engine with internal combustion comprises the following stages: when the engine is loaded, all cylinders are supplied at the stoichiometry and when the engine is lightly loaded, we no longer supplies fuel to at least one cylinder, all others cylinders being fed at stoichiometry, so as to decrease the apparent richness of engine power. So when the engine is weakly charged the non-powered cylinders see only pass air which does not cause fuel consumption or pollution and the supplied cylinders pollute little thanks to the mixture stoichiometric. For example, if we cut two cylinders from a four-cylinder engine we will operate at an apparent richness of 0.5.
- the gases of combustion of cylinders fed to stoichiometry are sent to a first catalyst and the gases from the cylinder (s) not fueled are sent to a second catalyst.
- the second catalyst will operate when all cylinders are powered by stoichiometry, the engine being loaded.
- the second catalyst is maintained in temperature by an external heating means, for example by the heat given off by the first catalyst. This maintains the second catalyst ready for operation as soon as all cylinders will be fed to stoichiometry.
- the end cylinders are fed to the stoichiometry and the central cylinders are no longer supplied with fuel.
- the internal combustion multi-cylinder engine comprises a computer for controlling the injection of fuel, at least one probe arranged at the outlet of the cylinders and a means of catalysis of combustion gases.
- the calculator is provided means for cutting off the fuel supply of at least one cylinder, the engine operating at low load.
- the motor includes a first catalyst connected to the cylinders supplied to the stoichiometry and a second catalyst connected to the susceptible cylinder to no longer be supplied with fuel, a ⁇ probe being arranged at the inlet of each catalyst.
- the ⁇ probe is connected to the control to adjust the fuel injection.
- the two catalysts are adjacent and provided with a common envelope, so that the first catalyst heats the second catalyst.
- the two catalysts are concentric, the the second catalyst being disposed inside the first catalyst.
- the second catalyst remains at temperature even when it is crossed by cold air coming from the cylinder (s) not fueled.
- the second catalyst remains ready to operate as soon as the corresponding cylinder or cylinders are again fueled.
- the motor includes four cylinders, two of which may no longer be fueled.
- the motor 1 is of the type with four in-line cylinders identified by the letters A, B, C and D.
- the cylinders A and D arranged at the ends of the engine 1 are provided respectively an exhaust gas outlet pipe 2 and 3.
- Tubing 2 and 3 are connected to a common tubing 4 which leads to a catalyst 5.
- Catalyst 5 is provided with a outlet pipe 6.
- the cylinders B and C arranged in the center of the engine 1 are respectively provided with outlet of exhaust gases 7 and 8 which connect into a pipe common 9.
- the common tubing 9 opens into a catalyst 10 provided with an outlet pipe 11.
- the outlet pipes 6 and 11 of the catalysts 5 and 10 then lead to means not shown, such as an exhaust.
- Catalyst 10a need to be at a relatively high temperature for a satisfactory operation.
- a heating means is therefore provided external of the catalyst 10.
- provision may be made to heat the catalyst 10 by an electrical resistance. It is even more advantageous to combine catalysts 5 and 10 in the same envelopes so that the heat given off by the catalyst 5 which works permanently to maintain the temperature of the catalyst 10 which operates intermittently.
- the catalyst 10 has the shape of a cylinder around which the catalyst 5. Catalysts 5 and 10 remain supplied with gas exhaust separately by their respective pipes 4 and 9. The outlet of catalysts 5 and 10 is in communication with a common tubing 12. The direction of gas flow is represented by the arrows.
- the motor 1 When the motor 1 is heavily stressed, the operation of catalysts 5 and 10 is carried out like that of a unique catalyst.
- the catalyst 10 sees only relatively cold air passing but is maintained at temperature by the heat released in the catalyst 5. At the next acceleration when the two cylinders B and C of the engine 1 will be powered again and send their exhaust gases in catalyst 10, it will immediately be able to clean up these exhaust gases.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims (10)
- Procédé de gestion d'un moteur multicylindres à combustion interne, caractérisé par le fait que :lorsque le moteur est chargé, tous les cylindres sont alimentés à la stoechiométrie,lorsque le moteur est faiblement chargé, au moins un cylindre n'est plus alimenté en carburant, tous les autres cylindres étant alimentés à la stoechiométrie, de façon à diminuer la richesse apparente d'alimentation du moteur.
- Procédé selon la revendication 1, caractérisé par le fait que les gaz de combustion des cylindres alimentés à la stoechiométrie sont envoyés vers un premier catalyseur et que les gaz issus du ou des cylindres non alimentés en carburant sont envoyés vers un deuxième catalyseur.
- Procédé selon la revendication 2, caractérisé par le fait que le deuxième catalyseur est maintenu en température par un moyen de chauffage externe.
- Procédé selon la revendication 3, caractérisé par le fait que le deuxième catalyseur est maintenu en température par la chaleur dégagée par le premier catalyseur.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé par le fait que, sur un moteur à quatre cylindres en ligne, les cylindres d'extrémité sont alimentés à la stoechiométrie et les cylindres centraux ne sont plus alimentés en carburant.
- Moteur multicylindres à combustion interne (1) comprenant un calculateur de contrôle de l'injection de carburant, au moins une sonde (13, 14) disposée en sortie des cylindres (A, B, C, D) et un moyen de catalyse (5, 10) des gaz de combustion, caractérisé par le fait que le calculateur est pourvu d'un moyen pour couper l'alimentation en carburant d'au moins un cylindre (B, C), le moteur fonctionnant à faible charge.
- Moteur selon la revendication 6, caractérisé par le fait qu'il comprend un premier catalyseur (5) relié aux cylindres (A, D) alimentés à la stoechiométrie et un deuxième catalyseur (10) relié au cylindre (B, C) susceptible de ne plus être alimenté en carburant, une sonde λ (13, 14) étant disposée à l'entrée de chaque catalyseur (5, 10).
- Moteur selon la revendication 7, caractérisé par le fait que les deux catalyseurs sont adjacents et pourvus d'une enveloppe commune, de façon que le premier catalyseur (5) réchauffe le deuxième catalyseur (10).
- Moteur selon la revendication 8, caractérisé par le fait que les deux catalyseurs sont concentriques, le deuxième catalyseur (10) étant disposé à l'intérieur du premier catalyseur (5).
- Moteur selon l'une quelconque des revendications 6 à 9, caractérisé par le fait qu'il comprend quatre cylindres (A, B, C, D) dont deux (B, C) sont susceptibles de ne plus être alimentés en carburant.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9700054A FR2758160B1 (fr) | 1997-01-06 | 1997-01-06 | Procede de gestion d'un moteur a combustion interne et moteur correspondant |
FR9700054 | 1997-01-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0852289A1 true EP0852289A1 (fr) | 1998-07-08 |
Family
ID=9502392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97403138A Withdrawn EP0852289A1 (fr) | 1997-01-06 | 1997-12-23 | Procédé de gestion d'un moteur à combustion interne et moteur correspondant |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0852289A1 (fr) |
FR (1) | FR2758160B1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004001210A1 (fr) * | 2002-06-21 | 2003-12-31 | Lotus Cars Limited | Desactivation des chambres de combustion dans un moteur de combustion interne a chambre de multi-combustion |
EP1522701A1 (fr) * | 2003-10-09 | 2005-04-13 | Ford Global Technologies, LLC, A subsidary of Ford Motor Company | Moteur multicylindres à combustion interne et procédé de mise hors-service de cylindre |
WO2005093229A2 (fr) | 2004-03-25 | 2005-10-06 | Avl List Gmbh | Systeme d'echappement pour moteur a combustion interne |
AT501401B1 (de) * | 2004-03-25 | 2007-06-15 | Avl List Gmbh | Abgasanlage für eine brennkraftmaschine |
FR2929986A1 (fr) * | 2008-04-10 | 2009-10-16 | Inst Francais Du Petrole | Dispositif de depollution de gaz d'echappement pour moteur a combustion interne du type a cylindres selectivement actifs ou inactifs et procede pour utiliser un tel dispositif. |
CN103541814A (zh) * | 2013-09-30 | 2014-01-29 | 哈尔滨东安汽车发动机制造有限公司 | 一种催化器分离式停缸技术发动机 |
FR3088959A1 (fr) * | 2018-11-27 | 2020-05-29 | Renault S.A.S | Procédé de commande d’un dispositif de traction pour véhicule automobile comprenant un dispositif de traitement des gaz de combustion chauffé électriquement |
WO2023010195A1 (fr) * | 2021-08-05 | 2023-02-09 | Fca Fiat Chrysler Automoveis Brasil Ltda | Système et procédé de gestion d'échappement pendant la désactivation sélective des cylindres |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4467602A (en) | 1981-10-28 | 1984-08-28 | Nissan Motor Company, Limited | Split engine control system |
US4517947A (en) | 1981-03-09 | 1985-05-21 | Mazda Motor Corporation | Multiple cylinder engine having air-fuel ratio control means in accordance with a signal from an exhaust gas sensor |
DE4311904A1 (de) | 1993-04-10 | 1994-10-13 | Audi Ag | Vorrichtung an einer Brennkraftmaschine |
DE4431058C1 (de) | 1994-09-01 | 1995-08-24 | Porsche Ag | Abgassystem für eine mehrzylindrige Brennkraftmaschine |
-
1997
- 1997-01-06 FR FR9700054A patent/FR2758160B1/fr not_active Expired - Fee Related
- 1997-12-23 EP EP97403138A patent/EP0852289A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4517947A (en) | 1981-03-09 | 1985-05-21 | Mazda Motor Corporation | Multiple cylinder engine having air-fuel ratio control means in accordance with a signal from an exhaust gas sensor |
US4467602A (en) | 1981-10-28 | 1984-08-28 | Nissan Motor Company, Limited | Split engine control system |
DE4311904A1 (de) | 1993-04-10 | 1994-10-13 | Audi Ag | Vorrichtung an einer Brennkraftmaschine |
DE4431058C1 (de) | 1994-09-01 | 1995-08-24 | Porsche Ag | Abgassystem für eine mehrzylindrige Brennkraftmaschine |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004001210A1 (fr) * | 2002-06-21 | 2003-12-31 | Lotus Cars Limited | Desactivation des chambres de combustion dans un moteur de combustion interne a chambre de multi-combustion |
EP1522701A1 (fr) * | 2003-10-09 | 2005-04-13 | Ford Global Technologies, LLC, A subsidary of Ford Motor Company | Moteur multicylindres à combustion interne et procédé de mise hors-service de cylindre |
WO2005093229A2 (fr) | 2004-03-25 | 2005-10-06 | Avl List Gmbh | Systeme d'echappement pour moteur a combustion interne |
AT501401B1 (de) * | 2004-03-25 | 2007-06-15 | Avl List Gmbh | Abgasanlage für eine brennkraftmaschine |
FR2929986A1 (fr) * | 2008-04-10 | 2009-10-16 | Inst Francais Du Petrole | Dispositif de depollution de gaz d'echappement pour moteur a combustion interne du type a cylindres selectivement actifs ou inactifs et procede pour utiliser un tel dispositif. |
CN103541814A (zh) * | 2013-09-30 | 2014-01-29 | 哈尔滨东安汽车发动机制造有限公司 | 一种催化器分离式停缸技术发动机 |
FR3088959A1 (fr) * | 2018-11-27 | 2020-05-29 | Renault S.A.S | Procédé de commande d’un dispositif de traction pour véhicule automobile comprenant un dispositif de traitement des gaz de combustion chauffé électriquement |
WO2020109204A1 (fr) * | 2018-11-27 | 2020-06-04 | Renault S.A.S | Procédé de commande d'un dispositif de traction pour véhicule automobile comprenant un dispositif de traitement des gaz de combustion chauffé électriquement |
WO2023010195A1 (fr) * | 2021-08-05 | 2023-02-09 | Fca Fiat Chrysler Automoveis Brasil Ltda | Système et procédé de gestion d'échappement pendant la désactivation sélective des cylindres |
Also Published As
Publication number | Publication date |
---|---|
FR2758160A1 (fr) | 1998-07-10 |
FR2758160B1 (fr) | 1999-03-26 |
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